category

英語（米国） (en-US) 英語（イギリス） (en-GB)

IPA（発音記号）

/ˈkætəˌɡɔɹi/

名詞

groups of things that are similar in some way

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詳細

意味（1）

A group, often named or numbered, to which items are assigned based on similarity or defined criteria.

The traditional way of describing the similarities and differences between constituents is to say that they belong to categories of various types. Thus, words like boy, girl, man, woman, etc. are traditionally said to belong to the category of Nouns, whereas words like a, the, this, and that are traditionally said to belong to the category of Determiners.

詳細

意味（2）

(mathematics) A collection of objects, together with a transitively closed collection of composable arrows between them, such that every object has an identity arrow, and such that arrow composition is associative.

The use of the word ‘factor’ shows the explicit intention of categorists to work with functions in an algebraic manner: a category is an algebra of functions.

詳細

categories （ 複数形 ）